CN101900957B - Image forming apparatus - Google Patents
Image forming apparatus Download PDFInfo
- Publication number
- CN101900957B CN101900957B CN2010101895612A CN201010189561A CN101900957B CN 101900957 B CN101900957 B CN 101900957B CN 2010101895612 A CN2010101895612 A CN 2010101895612A CN 201010189561 A CN201010189561 A CN 201010189561A CN 101900957 B CN101900957 B CN 101900957B
- Authority
- CN
- China
- Prior art keywords
- light
- photoreceptor
- wavelength
- forming apparatus
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/02—Charge-receiving layers
- G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
- G03G5/06—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being organic
- G03G5/0664—Dyes
- G03G5/0696—Phthalocyanines
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
The present invention therefore provides an image forming apparatus, comprising: a photoconductor; a charge means for charging the photoconductor; an exposure means for irradiating a surface of the photoconductor with light to form an electrostatic latent image; a development means for developing the electrostatic latent image formed; a transfer means for transferring the image developed onto a paper sheet; and a discharge means for irradiating the surface of the photoconductor with light to eliminate charges, wherein the photoconductor contains a titanylphthalocyanine having absorption bands in a wavelength region of 380 nm to 420 nm and a wavelength region of 600 nm to 850 nm as a charge generation material, the exposure means irradiates the surface of the photoconductor with light having a wavelength of 380 nm to 420 nm to form the electrostatic latent image, and the discharge means irradiates the surface of the photoconductor with light having a wavelength of 600 nm to 850 nm to eliminate the charges.
Description
Invention field
The present invention relates to a kind of electrophotographic image-forming apparatus, for example, use duplicating machine, fax and the printer of electrophotographic system.
More specifically, the present invention relates to a kind of electrophotographic image-forming apparatus, said device comprises: use the blue laser with short wavelength as the exposed portion of writing exposure light; Use has the discharge portion of long wavelength's red LED as discharging light; And the Electrophtography photosensor that contains charge generating material with the absorption region that is used for these two kinds of wavelength.
Background technology
The image of electrophotographic system forms, and carries out through recharge, exposure, development, transfer printing, cleaning and discharge step around photoreceptor.
In recent years in,, higher printed resolution is increased with the requirement that higher resolution and colorize are combined with regard to picture quality.
In order to obtain higher printed resolution, must make the diameter of exposure station littler.In addition, for the diameter that makes exposure station is littler, the vibration wavelength that shortens its light source is effective.
For example, when using vibration wavelength as the only about half of short wavelength laser of the vibration wavelength of the conventional laser device in the near-infrared region during as light source, the spot diameter of laser beam on photographic layer can reduce almost half in theory, as indicated by following formula (1):
d∝(π/4)(λf/D) (1)
Wherein d is the spot diameter on the photographic layer, and π is a circular constant, and λ is the wavelength of laser beam, and f is the focal length of f θ lens, and D is the diameter of lens.
Therefore, shorten the vibration wavelength of exposure light, be used for the writing density of sub-image for increase, that is, it is very favorable increasing resolution.
Therebetween; Because the energy of each photon and wavelength increase with being inversely proportional to; Therefore compare with the ruddiness with long wavelength, the blue light with the short wavelength in the near ultraviolet band more possibly chemically change material through the light deterioration, because material repeatedly is exposed to short wavelength's light in over a long time.
That is, in over a long time, be exposed to the material (in the situation of electrophotographic image-forming apparatus, being included in charge generating material and/or charge transport materials in the photoreceptor) of light, stand the light deterioration with short wavelength.
The uncensored patent of Japan announces that No.2005-181991 discloses the longer discharging light of wavelength ratio exposure light wavelength that use has.But, announce among the No.2005-181991 that in the uncensored patent of Japan the wavelength relationship between discharging light and the exposure light is in 380nm to 520nm, and the blue light with 520nm or following wavelength still is used as discharging light.That is, photoreceptor still stands the light deterioration after using over a long time.
In utilizing the step of exposure of exposure device and utilizing in the discharge step of electric discharge device and using the rayed photoreceptor.
Discharge step applies light through the whole zone to photoreceptor, being used to eliminate after transfer step and the cleanup step unevenness of remaining electric charge on photosensitive surface, and is that in charge step subsequently, to regain the uniform charging state necessary.
In general, the amount of discharging light is about 3 times to 5 times of amount of exposure light.
Exposure light only is applied to image area, more particularly, after being modulated into the amount that meets each image density, is applied on the image section of image area.On the other hand, discharging light was applied on the whole zone with constant amount before charge step.
That is to say; In a series of images forming process of charging, exposure, development, transfer printing, cleaning and discharge; Exposure device with light with the amount that meets image density be applied to photoreceptor only with the corresponding part of picture size, more particularly, be applied to the part that image exists.
On the other hand, before the charge step in above-mentioned a series of images forming process, electric discharge device must be applied to whole zone with 3 times to 5 times the amount of maximum of exposure light with light.
That is to say that major part will be applied to the only discharging light of photoreceptor.
In general; Use blue light to make public in the high printed resolution image forming apparatus of writing therein with short wavelength; Use has the photoreceptor of sensitivity in the short wavelength zone, and therefore, in discharge step; Also use the light that in wavelength region may, has sensitivity, promptly use blue light to discharge.Therefore; Make public and use in the image forming apparatus that light with short wavelength discharges at the light that use has a short wavelength, photoreceptor always is exposed to the light with short wavelength, and when using over a long time; Because the light deterioration causes its performance degradation, causes image deterioration.
Summary of the invention
Therefore, target of the present invention provides a kind of image forming apparatus, and said image forming apparatus unlikely takes place to use the light deterioration that causes of following over a long time, and allows stably to print out high printed resolution.
Inventor of the present invention has carried out research extensively and profoundly; And be devoted to solve the above-mentioned problem; And the result finds, is used to provide the exposure device and the electric discharge device of different exposure light of wavelength and discharging light, and the charge generating material that will be the short wavelength all have light absorption in the regional and long wavelength zone is used for photoreceptor; Can solve above-described problem, thereby accomplish the present invention.
Therefore, the invention provides a kind of image forming apparatus, comprising: photoreceptor; Charging device, said charging device is used for photoreceptor is charged; Exposure device, said exposure device are used to utilize light to shine the surface of photoreceptor, to form electrostatic latent image; Developing apparatus, said developing apparatus are used for the electrostatic latent image that forms is developed; Transfer device, said transfer device are used for the image that develops is transferred to paper; And electric discharge device; Said electric discharge device is used to utilize light to shine the surface of photoreceptor; To eliminate electric charge; Wherein photoreceptor be included in have absorption band in the wavelength region may of wavelength region may and 600nm to 850nm of 380nm to 420nm titanyl phthalocyanine as charge generating material; The surface that the light that the exposure device utilization has 380nm to a 420nm wavelength shines photoreceptor to be forming electrostatic latent image, and the electric discharge device utilization has surface that the light of 600nm to 850nm wavelength shines photoreceptor to eliminate electric charge.
Image forming apparatus comprises: photoreceptor, said photoreceptor contain in the wavelength region may of the wavelength region may of 380nm to 420nm and 600nm to 850nm, have absorption titanyl phthalocyanine as charge generating material; Exposure device, said exposure device are used to provide the light of the exposure with 380nm to 420nm wavelength; And electric discharge device, said electric discharge device is used to provide the discharging light with 600nm to 850nm wavelength.
The present invention also provides a kind of image forming apparatus; Wherein, Titanyl phthalocyanine is the crystal titanyl phthalocyanine; In the X-ray diffraction wave spectrum of CuK α characteristic X-ray (wavelength:
), be 7.3 °, 9.4 °, 9.6 ° and 27.2 ° at Bragg angle (2 θ ± 0.2 °) and locate to have main peak; Be maximum peak wherein, and be second largest peaks at 27.2 ° of peaks of locating by 9.4 ° and 9.6 ° of peaks of the locating formed peak bundle that overlaps.
The present invention also provides a kind of wherein exposure device to be used for the image forming apparatus of the printing of high printed resolution.
It is the image forming apparatus of blue semiconductor laser that the present invention also provides a kind of wherein exposure device.
It is the image forming apparatus of red LED that the present invention also provides a kind of wherein electric discharge device.
Description of drawings
Fig. 1 is the cross sectional representation that image forming apparatus of the present invention is shown;
Fig. 2 is the figure that the X-ray diffraction wave spectrum of the CuK α characteristic X-ray (wavelength:
) that can be used for photoreceptor of the present invention is shown;
Fig. 3 is the figure that the absorption characteristic that can be used for photoreceptor of the present invention is shown; And
Fig. 4 is the figure that the absorption characteristic of the photoreceptor that can be used for comparative example is shown.
Embodiment
Be included in the use of the photoreceptor of the titanyl phthalocyanine that has absorption in the wavelength region may of wavelength region may and 600nm to 850nm of 380nm to 420nm; Allow to use the light of 380nm to 420nm to make public, and use the light of 600nm to 850nm to eliminate remaining electric charge.In addition, the light (blue light) that uses the short wavelength with 380nm to 420nm makes that as exposure light the spot diameter of writing light is littler, that is, make resolution be improved.In addition, the light (ruddiness) that uses the long wavelength with 600nm to 850nm is applied to the most discharging light of the light total amount of photoreceptor as formation, makes to be minimized in the photoreceptor because the light deterioration that short wavelength's light causes.As a result, can realize that image forms with high printed resolution, and after over a long time, have less deterioration in image quality.
The term " high printed resolution " that uses in the present invention is meant so-called 600x1200dpi resolution, 1200x1200dpi resolution, 1200x2400dpi resolution, 2400x2400dpi resolution etc.
The term " standard printed resolution " that uses in the present invention is meant so-called 600x600dpi resolution.
The photoreceptor that in image forming apparatus according to the present invention, comprises can be the multilayer photoreceptor, and wherein, the charge generation layer that comprises charge generating material is formed on the conductive support with this order with the charge transport layer that comprises charge transport materials.
Can be as an alternative, the multilayer photoreceptor among the present invention can have middle layer, charge generation layer and the charge transport layer that on conductive support, forms successively.
Can be as an alternative, the multilayer photoreceptor among the present invention can have charge generation layer, charge transport layer and the protective seam that on conductive support, forms successively.
In addition, can be as an alternative, the multilayer photoreceptor among the present invention can have middle layer, charge generation layer, charge transport layer and the protective seam that on conductive support, forms successively.
In addition, photoreceptor of the present invention can be the individual layer photoreceptor, and the photographic layer that wherein comprises charge generating material and charge transport materials is formed on the conductive support.The individual layer photoreceptor can have middle layer above-mentioned and/or protective seam alternatively.
Conductive support
To the not concrete restriction of conductive support, as long as it has as the function of the electrode of multilayer photoreceptor and as the function of supporting member, and its material is selected from the material of use in the art.
Its instantiation comprises metal material, for example, and aluminium, aluminium alloy, copper, zinc, stainless steel, titanium; And on by the support surface that forms such as the polymeric material of polyethylene terephthalate, polyamide, polyester, polyoxymethylene and polystyrene or bakelite paper, glass etc., through laminated metal foil, vapor deposited metal material or vapour deposition or apply the material that the conducting compound layer such as conducting polymer, tin oxide, indium oxide obtains.
To the not restriction of the shape of conductive support, and it can be sheet, cylindric, column, ring-band shape etc.
If desired; The surface treatment of chemical substance or hot water, painted processing can handled, use in the surface of conductive support through anodized coating or the irregular reflection of the degree that do not affect adversely to picture quality such as surface roughening is handled, and processes.
Charge generation layer
Charge generation layer is characterised in that and contains charge generating material that it has the wavelength of 380nm to 420nm through absorption light produces electric charge with the light with wavelength of 600nm to 850nm.
Specifically; Inventor of the present invention has been found that; Have special crystal structure, allow to absorb titanyl phthalocyanine with the different wave length light ray in near-infrared region and the ultraviolet region; For exposure light and discharging light, can be used as charge generating material with the different wave length in ultraviolet region and near-infrared region.
More particularly; Titanyl phthalocyanine as charge generating material is preferably the crystallization titanyl phthalocyanine in the present invention; It is in the X-ray diffraction wave spectrum of CuK α characteristic X-ray (wavelength:
); Be 7.3 °, 9.4 °, 9.6 ° and 27.2 ° at Bragg angle (2 θ ± 0.2 °) and locate to have main peak; The peak bundle that is wherein overlapped by 9.4 ° and the 9.6 ° peaks of locating and form is maximum peak; At 27.2 ° of peaks of locating are second largest peaks, as shown in Figure 2.
Promptly; Inventor of the present invention has been found that; Contain in the present invention the photoreceptor of the titanyl phthalocyanine that uses, in the zones of different of 380nm to 420nm and 600nm to 850nm, have the light ray absorption band, and these absorption bands can with the Wavelength matched of light wavelength and discharging light of making public.
The position of each absorption band changes according to the central metal and the crystal type of phthalocyanine; Except crystal titanyl phthalocyanine of the present invention; Image forming apparatus of the present invention can use any material, as long as this material has the special spectrum of custom (Soret) band in this position.
Charge generation layer can comprise adhesive resin, is used to improve its bond property.
As adhesive resin, can use the resin that uses in the art, and preferably have the adhesive resin of remarkable compatibility with charge generating material with bond property.
Its instantiation comprises vibrin, polystyrene resin, urethane resin, phenolics, alkyd resin, melamine resin, epoxy resin, silicones, acryl resin, methacrylate resin, polycarbonate resin, polyarylate resin, phenoxy resin, polyvinyl butyral resin, vinyl-formal resin, comprise the copolymer resin etc. of the repetitive of the above-mentioned resin of two or more formation.
The instance of copolymer resin comprises the insulating resin such as vinyl chloride/vinyl acetate copolymer resin, vinyl chloride/vinyl acetate/copolymer-maleic anhydride resin and vinyl cyanide/styrene copolymer resin.Adhesive resin is not limited to resin above-mentioned, and can be used as adhesive resin at any resin commonly used in the art.
These adhesive resins can independently use or two or more bond resin combination is used.
Although not concrete restriction, the ratio of adhesive resin is to be 0.5 to 2.0 part of weight with respect to the charge generating material of 100 parts of weight.
If desired, charge generation layer can comprise one or more materials of the fine grained that is selected from hole mobile material, electron transport material, anti-oxidant, ultraviolet light absorber, dispersion stabilizer, sensitizer, levelling agent, plastifier, mineral compound or organic compound etc. of suitable amount.
The mixing of plastifier and levelling agent makes coating performance, flexibility and surface smoothness be able to improve.
The instance of plastifier comprises such as phthalic ester, fatty acid ester, phosphate, chlorinated paraffin, the dibasic acid ester of the plastifier of epoxy type etc.
The instance of levelling agent is surrounded by the levelling agent of machine silicon-type.
Charge generation layer can form through generally well-known dry process and wet processing.
The instance of dry process comprises that wherein charge generating material is vacuum-deposited the method on the conductive support.
The instance of wet processing comprises following method: with charge generating material and if desired; With adhesive resin dissolving or be dispersed in the suitable organic solvent; Be used to form the coating fluid of charge generation layer with preparation; Coating fluid is applied on the surface in the middle layer that forms on surface or the conductive support of conductive support, dry then to remove organic solvent.
The instance of solvent that is used to form the coating fluid of charge generation layer comprises the halogenated hydrocarbons such as methylene chloride and ethylene dichloride; Ketone such as acetone, MEK and cyclohexanone; Lipid such as ethyl acetate and butyl acetate; (THF) is with the ethers of diox such as tetrahydrofuran; Such as 1, the alkyl ether of the monoethylene glycol of 2-dimethoxy-ethane; Aromatic hydrocarbons such as benzene, toluene and xylene; And such as N, the aprotic polar solvent of dinethylformamide and DMAC N,N.In these solvents, consider according to total environment, preferably use the organic solvent of halogen.These solvents can use separately or two or more solvent combinations is used.
Before dissolving or being dispersed in the solvent, charge generating material can use muller to grind in advance.The instance of muller comprises bowl mill, sand mill, attitor, vibration grinding machine, ultrasonic dispersion machine etc.
In order charge generating material to be dissolved or to be dispersed in the solvent, can use dispersion machine such as paint shaker, bowl mill and sand mill.In this case, preferably compatibly set dispersion condition, so that prevent that the coating fluid quilt is owing to the impurity of the generations such as wearing and tearing of the material that forms container and dispersion machine pollutes.
As the applying method of the coating fluid that is used to form charge generation layer, can come compatibly to select the best approach according to the physical property and the throughput rate of coating fluid.The example comprises spraying method, bar type coating process, print roll coating method, knife coating, suspension ring method, dip coated method etc.
In these applying methods, the dip coated method is simple relatively, and favourable relatively aspect throughput rate and cost, and therefore can compatibly be used to produce photoreceptor.In the dip coated method, matrix is immersed in the coating container that coating fluid is housed, mention cambium layer on matrix surface with constant speed or the speed that continuously changes then.It is the coating fluid decollator of representative that the device that is used for the dip coated method can provide with the ultrasonic generator, so that the dispersiveness of coating fluid is stable.
To the not concrete restriction of the temperature in the dried coating film step, as long as temperature allows to remove the organic solvent that uses, and be preferably 50 ℃ to 140 ℃, be preferably 80 ℃ to 130 ℃ especially.
Drying time can be prolonged less than 50 ℃ baking temperatures.On the other hand, in repeated use, can cause the quality deterioration of image of deterioration and acquisition of the electrical characteristics of photoreceptor greater than 140 ℃ baking temperature.
This temperature conditions during photographic layer is produced, other processing and the photographic layer described for the formation and the back literary composition of other layers that comprise the middle layer are general.
Although not concrete restriction, the film thickness of charge generation layer is preferably 0.05 μ m to 5 μ m, is preferably 0.1 μ m to 1 μ m especially.
Film thickness less than the charge generation layer of 0.05 μ m can cause efficiency of light absorption to reduce, to reduce the sensitivity of photoreceptor.On the other hand, greater than the film thickness of the charge generation layer of 5 μ m, can cause the charge transfer in the charge generation layer to become the rate controlling step in the process of removing the lip-deep electric charge of photographic layer, thereby reduce the sensitivity of photoreceptor.
Charge transport layer
Charge transport layer comprises as the aminated compounds of charge transport materials and adhesive resin.
The content of aminated compounds is preferably 5% to 70% of charge transport layer weight.
Aminated compounds content less than 5% weight ratio can cause the charge transfer failure, thus desensitization.On the other hand, can cause the reduction of film strength greater than the aminated compounds content of 70% weight ratio.
For example.For the physical strength of improving charge transport layer, durability etc., can comprise adhesive resin.
As adhesive resin; In the resin that uses in the art with bond property; Can use the transparent resin that does not absorb light with 380nm to 420nm wavelength, and with charge generation layer in the identical resin that comprises can use separately or two or morely use in combination.
In the resin that these are mentioned, polystyrene, polycarbonate, polyarylate and polyphenylene oxide are preferred, because have 10
13The specific insulation that Ω is above is to illustrate remarkable electrical insulation property and to have remarkable coating performance, voltage characteristic etc., wherein special optimization polycarbonate.
Although not concrete restriction, the ratio of adhesive resin is about 50 parts of weight to 300 part weight with respect to the charge transport materials of 100 parts of weight.
If desired, charge transport layer can comprise one or more materials of fine grained of being selected from hole mobile material, electron transport material, anti-oxidant, ultraviolet light absorber, dispersion stabilizer, sensitizer, levelling agent, plastifier, mineral compound or organic compound etc.
The mixing of anti-oxidant and ultraviolet light absorber makes in the photographic layer because the deterioration that causes such as the oxidizing gas of ozone and nitrogen oxide reduces, and the stability of improvement coating fluid.Therefore, the mixing of these reagent is preferred for the charge transport layer as the top layer of photoreceptor.
The instance of anti-oxidant comprises phenolic compound, hydroquinone compound, and tocopherols compound and aminated compounds etc., wherein Hinered phenols derivant, hindered amines derivant and composition thereof are preferred especially.
The content of anti-oxidant is preferably 0.1 part of weight to 50 part weight with respect to the charge transport materials of 100 parts of weight.
Less than the oxidation preventive content of 0.1 part of weight, can cause to obtain the stability of enough improvement coating fluids and the effect of the durability of improving photoreceptor.On the other hand, greater than the oxidation preventive content of 50 parts of weight, can have adverse effect to the character of photoreceptor.
Identical with the situation of charge generation layer, charge transport layer can be used to form the coating fluid of charge transport layer through preparation, and through using wet processing, particularly the dip coated method forms.
For the solvent that is used for preparing the coating fluid that is used to form charge transport layer, be used to form the identical solvent that uses in the coating fluid of charge generation layer with preparation, can use separately or two or more use in combination.
Other steps and the condition that are used for it and are used to form the consistent of charge generation layer.
Although not concrete restriction, the film thickness of charge transport layer is preferably 5 μ m to 40 μ m, is preferably 10 μ m to 30 μ m especially.
Less than the film thickness of the charge transport layer of 5 μ m, can cause electric charge on the photosensitive surface to be held and stay the ability deterioration, thereby reduce the contrast of output image.On the other hand, greater than the film thickness of the charge transport layer of 100 μ m, can cause the throughput rate of photoreceptor to reduce.
In addition, charge transport layer preferably makes to have as the light of 380nm to the 420nm wavelength of exposure light wavelength and the light with 600nm to 850nm wavelength and passes through.
Middle layer (internal coating)
Photoreceptor of the present invention preferably has the middle layer between conductive support and multilayer photographic layer.
The middle layer has and prevents that electric charge is injected into the function of multilayer photographic layer from conductive support.That is to say, suppressed the deterioration of multilayer photographic layer chargeability, and in the part the electric charge of being eliminated except exposure, limited the minimizing of surface charge, prevent to produce the image that has such as fuzzy defective.Specifically, can prevent to be called as the image blurring generation of stain, this stain is meant the tiny stain of the toner (toner) that in image forms, forms on white background through anti-developing process.
In addition; The middle layer of coating conductive supporting surface can reduce roughness; This is the defective of conductive supporting surface, and can planarization should the surface improving the coating performance of multilayer photographic layer, thereby improve the adhesiveness between conductive support and the multilayer photographic layer.
The middle layer can form through for example following steps: resin material is dissolved in the suitable organic solvent coating fluid that is used to form the middle layer with preparation, and coating fluid is applied on the conductive support, be dried then to remove organic solvent.
The instance of resin material comprise such as the natural polymeric material of casein, gelatin, polyvinyl alcohol (PVA) and ethyl cellulose and with charge generation layer and charge transport layer in the identical adhesive resin that comprises, and can use wherein one or more.In these resins, polyamide is preferred, and the alcohol soluble nylon resin is preferred especially.
The instance of alcohol soluble nylon resin comprises through with 6-nylon, 6,6-nylon, 6, copolymerization such as 10-nylon, 11-nylon, 2-nylon, 12-nylon and the so-called copolyamide that obtains; And by such as the chemical modification nylon of the nylon of N-alkoxy methyl modification and the modification of N-alkoxyethyl and the resin that obtains.
Wherein the instance of the solvent of dissolving or dispersion resin material comprises water; Alcohols such as methyl alcohol, ethanol and butanols; Glyme such as methyl carbitol and BC; Solvent such as ethylene dichloride, chloroform and trichloroethanes based on chlorine; Acetone; Dioxolanes; The mixed solvent that obtains through two or more these solvent.In these solvents, consider according to total environment, preferably use the organic solvent of halogen.
Be used for its other steps and condition and be used to form charge generation layer and charge transport layer consistent.
In addition, the coating fluid that is used to form the middle layer can comprise metal oxide particle.
Metal oxide particle can easily be adjusted the specific insulation in middle layer, allowing preventing that further electric charge is injected in the multilayer photographic layer, and keeps the electrical characteristics of photoreceptor under various varying environments.
The instance of metal oxide particle comprises titanium dioxide, aluminium oxide, hydrate of aluminium and granules of stannic oxide.
The general assembly (TW) of resin material and metal oxide particle is C in the coating fluid that is used to form the middle layer, and the weight of solvent is when being D, and the ratio between them (C/D) is preferably 1/99 to 40/60, is preferably 2/98 to 30/70 especially.
In addition, when resin material weight is E, and the weight of metal oxide particle is when being F, and the ratio between them (E/F) is preferably 90/10 to 1/99, is preferably 70/30 to 5/95 especially.
Although not concrete restriction, the film thickness in middle layer is preferably 0.01 μ m to 20 μ m, is preferably 0.05 μ m to 10 μ m especially.
Less than the film thickness in the middle layer of 0.01 μ m, can cause this layer can not be basically as the middle layer and can not be coated with through defective flat surfaces is provided to conductive support.That is to say, in this case, can not prevent that electric charge is injected into the multilayer photographic layer from conductive support, causes the deterioration of multilayer photographic layer chargeability.On the other hand, greater than the film thickness in the middle layer of 20 μ m, can make to be difficult to form smooth middle layer and to be difficult on the middle layer, form smooth multilayer photographic layer, thereby reduce the sensitivity of photoreceptor.
When the material that is used to form conductive support is aluminium, can form contain alunite layer (alunite layer) as the middle layer.
Protective seam
Photoreceptor of the present invention can have protective seam on the multilayer photographic layer.
Protective seam can have the function of the durability that improves photoreceptor, and is processed by adhesive resin.Protective seam can contain one or more with charge transport layer in the identical charge transport materials that comprises.
The instance of adhesive resin comprise with charge generation layer and charge transport layer in the identical adhesive resin that comprises.
Protective seam can form through for example following steps: adhesive resin is dissolved in the suitable organic solvent coating fluid that is used to form protective seam with preparation, and coating fluid is applied on the multilayer photographic layer, be dried then to remove organic solvent.
Be used for its other steps and condition and be used to form charge generation layer and charge transport layer consistent.
Although not concrete restriction, the film thickness of protective seam is preferably 0.5 μ m to 10 μ m, is preferably 1 μ m to 5 μ m especially.
Less than the film thickness of the protective seam of 0.5 μ m, can cause abrasion resistance difference and durability in the photosensitive surface not enough.On the other hand, greater than the film thickness of the protective seam of 10 μ m, can cause the resolution of photoreceptor to reduce.
In addition, protective seam need allow to pass through as light in 380nm to the 420nm wavelength coverage of exposure light wavelength and the light in 600nm to the 850nm wavelength coverage.
Image forming apparatus of the present invention comprises: multilayer photoreceptor of the present invention; Be used for charging device to the photoreceptor charging; The light that use has 380nm to 420nm wavelength makes public to form the exposure device of electrostatic latent image to the photoreceptor that is recharged; And remain in the electric discharge device of the electrostatic latent image on the photosensitive surface with elimination using light that photoreceptor is discharged after the cleaning with 600nm to 850nm wavelength.
Exposure device
Instance as the exposure device of the light source of the exposure light with 380nm to 420nm wavelength that uses in the image forming apparatus according to the present invention comprises blue laser diode.
More particularly, the instance of above-mentioned light source comprises blue laser diode GH04020B2AE and the GH04020A2GE that is made by Sharp Corp.
Electric discharge device
Instance as the electric discharge device of the light source of the discharging light with 600nm to 8500nm wavelength that uses in the image forming apparatus according to the present invention comprises the bulb such as Halogen lamp LED and fuse bulb; Discharge spot such as fluorescent light; Semiconductor device such as the LED lamp; And such as the various luminescent device of EL element.
From microminiaturized or reduce the viewpoint of electrical power consumed and heat release, be preferred especially such as the economize on electricity device of LED.
As the instance of LED of economize on electricity device comprise among the LED that makes by Sharp Corp such as HD series, D is serial, TR is serial, T is serial, UR is serial, U is serial, PR is serial, the LED of P series etc.
A plurality of such light-emitting components can be arranged in linearly photoreceptor the axle direction on; To form linear light sorurce; So that the surface of direct irradiation photoreceptor, or can be arranged to through the surface of photoconduction to guiding photoreceptors such as elements from the light of one or more light-emitting components.
In addition, in the optical path between the surface of light source and photoreceptor BPF. can be provided, so as to obtain to have required wavelength, be the above light of 600nm, perhaps can provide diffusion wave filter etc. so that obtain the even distribution of light quantity on the photosensitive surface.
Next, will describe the image forming apparatus that uses among the embodiment with reference to accompanying drawing.
Fig. 1 illustrates the structure of image forming apparatus 10.As shown in fig. 1, image forming apparatus 10 is used to write down and export from the view data such as the aerial lug spare of personal computer, and the image that reads through cis spare (not shown) of record and output.
In image forming apparatus 10, the processing unit of each function of carries out image forming process be arranged on photosensitive drums 3 around.Around photosensitive drums, be disposed with: charging device 5, charge equably in its surface that is used to photosensitive drums 3; Light scanning unit 11, it is used to carry out the photosensitive drums 3 of exposure and scanning uniform charging, to write electrostatic latent image as exposure device; Developing cell 2, the electrostatic latent image that the developer that its use provides from developer reservoir 7 is write light scanning unit 11 develops; Transfer device 6, it is used for the image that develops on the photosensitive drums 3 is transferred to paper; Cleaning unit 4, it is used to remove developer residual on photosensitive drums 3; Discharge lamp unit 12, it is used to remove photosensitive drums 3 lip-deep electric charges as electric discharge device; Or the like.
On the paper transportation route, the upstream side with respect to the transfer position between photosensitive drums 3 and transfer device 6 is provided with contraposition roller 14, is used to guide paper to arrive transfer position at the fixed time.On the other hand,, photographic fixing device 8 is set, is used for the developer image fixing that adheres to the not photographic fixing on the paper at paper in downstream with respect to the transfer position on the paper transportation route.
In the bottom of image forming apparatus 10, paper feed pallet 94 is configured to be included in the main body of image forming apparatus 10.Near paper feed pallet 94, paper-sheets rolling wheel 16 is set, be used for separating the top sheet that is included in paper feed pallet 94 and guide paper to get into the paper transportation route.
In this transfer position, the developer image that forms on the photosensitive drums 3, the action of the transfer voltage through transfer device 6 is transferred on the paper.Replenish paper to this paper feed pallet 94, carry out through paper feed pallet 94 is pulled out from the front portion of image forming apparatus 10.In addition; Bottom at image forming apparatus 10; Provide a kind of unshowned preparation as peripheral device, have the ADF of multistage paper feed pallet, and be used to receive the paper of seeing off from the ADF that can hold a large amount of paper and be used for paper receiver 17 (17a to 17c) to the image forming portion continuous paper-feeding.
Paper through transfer position is directed to photographic fixing device 8.In photographic fixing device 8, the paper that transfer printing has an image on it is received continuously, and the heat that produces through fixing roller 81, pressure roll 82 etc. of the developed image that is transferred to the not photographic fixing on the paper and pressure and by photographic fixing.Its epigraph paper of photographic fixing is sent to the more downstream of paper transportation route through transfer roller 25, and the switching door 9 that leads.
Image forming apparatus of the present invention is the commercially available duplicating machine AR-625S that is made by Sharp Corp
TMImproved goods, can use and have various different wavelength of laser Shu Jinhang and write exposure through changing light scanning unit 11.Likewise, through changing discharge lamp unit 12, image forming apparatus can use the discharging light with various different wave lengths to discharge.
Next, with the production example of describing titanyl phthalocyanine that uses in an embodiment and the photoreceptor A that contains titanyl phthalocyanine.
Produce example 1
The production of titanyl phthalocyanine
Amount is mixed for the diimino isoindoline of 29.2g and the sulfolane of amount for 200ml, is the tetraisopropoxy titanium of 17.0g to addition wherein, under nitrogen environment 140 ℃ of reactions 2 hours.After the cooling, leach sediment, and clean with chloroform, clean with 2% aqueous hydrochloric acid solution, water cleans, and uses washed with methanol, and carries out drying, has obtained the titanyl phthalocyanine that 25.5g is represented by following structural formula (productive rate 88.5%):
[structural formula 1]
The titanyl phthalocyanine that obtains is proved to be the crystal titanyl phthalocyanine; As shown in Figure 2; In the X-ray diffraction wave spectrum of CuK α characteristic X-ray (wavelength:
); Be 7.3 °, 9.4 °, 9.6 ° and 27.2 ° at Bragg angle (2 θ ± 0.2 °) and locate to have main peak; The peak bundle that is wherein overlapped by 9.4 ° and the 9.6 ° peaks of locating and form is maximum peak; At 27.2 ° of peaks of locating are second largest peaks, and as shown in Figure 3, are in 380nm to 420nm wavelength region may with in 600nm to the 850nm wavelength region may, to have the titanyl phthalocyanine of absorption.
Produce example 2
The production of photoreceptor A
Photoreceptor A is according to following method production.
With amount is the titania (brand name:
TTO-D-1 of 3 parts of weight; By ISHIHARA SANGYO KAISHA; LTD. produce) be the commercially available polyamide (brand name:
CM8000 of 2 parts of weight with measuring; By Toray Industries; Inc. production) amount of joining is in the methyl alcohol of 25 parts of weight; Use paint shaker to disperse 8 hours, be used to form internally coated coating fluid to produce 3kg.The internally coated coating fluid that is used to form that obtains is cut (being processed into 10 surfaceness RzJIS according to JISB-0601 is 0.80 μ m); Being applied to through the dip coated method then that to have the surface, the diameter that cleaned be that 80mm, length are the aluminium conductive support of 348mm, is the internal coating of 1 μ m to form film thickness.
With amount is that the titanyl phthalocyanine that in above-mentioned production example 1, obtains of 1 part of weight is the butyral resin (brand name: BM-2 of 1 part of weight with amount
TM, produce by Denki Kagaku Kogyo K.K.), be that the MEK of 98 parts of weight mixes with amount, use paint shaker to disperse, to prepare the coating fluid that 3kg is used to form charge generation layer.The coating fluid that is used to form charge generation layer according to being applied to internally coated surface with forming the identical mode of internal coating, and is carried out air drying, and the film thickness that has with formation is the charge generation layer of 0.3 μ m.
Subsequently, with 100 parts of weight, that have following structure, as triphenyl amine compound (the TPD) (brand name: D2448 of charge transport materials
TM, by Tokyo Chemical IndustryCo., Ltd. produces),
[structural formula 2]
Polycarbonate resin (the TS2050 of 150 parts of weight
TM: produce by TEIJIN CHEMICALSLTD.) and the silicone oil (brand name: SH200 of 0.02 part of weight
TM, produce by Dow CorningToray) mix, and be dissolved in the tetrahydrofuran as solvent, to prepare the coating fluid that 3kg is used to form charge transport layer, having solid content is 25% weight ratio.With the coating fluid that is used to form charge transport layer, be applied to the surface of the charge generation layer of previous preparation through the dip coated method, and, have the charge transport layer that film thickness is 25 μ m with formation 120 ℃ of dryings 1 hour.Thus, produced photoreceptor A as the multilayer photoreceptor.
Produce example 3
The production of photoreceptor B
According to produce example 2 in be used to produce photoreceptor A the identical mode of method produce photoreceptor B; Difference is to use the dibromo anthanthrone (model: D01148 is produced by ZENECA limited) with the absorption shown in Fig. 4 to replace titanyl phthalocyanine to be used as charge generating material.
Embodiment 1
The embodiment 1 that forms by producing photoreceptor A that produces in the example 2 and the image forming apparatus of early describing 10 combinations will be described now.
Photoreceptor A is incorporated in the image forming apparatus 10 of setting as follows.That is to say; Photoreceptor A is incorporated in the image forming apparatus 10; Wherein light scanning unit 11 is changed into the light scanning unit that use has the laser beam of 405nm wavelength and comprises the optical system that can be used in 1200dpi, and discharge lamp element 12 do not change, with original AR-625S
TMIn ruddiness equally is provided.Here, the maximum exposure light quantity is adjusted to and can provides-amount of the plain telegram position of the photoreceptor A of 60V ± 5V.
Discharge light quantity and original AR-625S
TMIn.Therefore, image forming apparatus is configured to export printed images and carries out the durability evaluation test.Nature has obtained high resolution and gratifying image in the incipient stage, and even be increased to when reaching about 125k and opening when the number of testing paper, still can obtain this high resolution and gratifying image.After this, when test paper number order reaches 200k and opens, obtained the image of acceptable level, although some image deteriorations have taken place.Table 1 illustrates the result.
In order to compare with embodiment 1, table 1 has comprised the result of comparative example 1 to 3, wherein used with embodiment 1 in identical photoreceptor A, the conditions of exposure in the image forming apparatus 10 is different with discharging condition; And the result of comparative example 4 to 7, wherein used with embodiment 1 in different photoreceptor (producing the photoreceptor B that describes in the example 3).Comparative example 1 to 7 will be described below.
Comparative example 1
Photoreceptor A is incorporated in the image forming apparatus 10, wherein with embodiment 1 in identical light scanning unit (the 405nm wavelength 1200dpi) is used as light scanning unit 11, and comprises the blue led (NS4C107T that arranges and provide
TM, produce by Nichia Corporation) discharge lamp unit be used as discharge lamp unit 12.The maximum exposure light quantity be adjusted to embodiment 1 in amount identical, and the discharge light quantity is adjusted to when on the surface that is positioned at photoreceptor and original AR-625S
TMIdentical, prepared image forming apparatus thus.
Comparative example 2
Photoreceptor A is incorporated in the image forming apparatus 10 wherein original AR-625S
TMLight scanning unit (780nm wavelength, 600dpi for standard picture) be used as light scanning unit 11, and with comparative example 1 in identical discharge lamp unit (blue light) be used as discharge lamp unit 12.The maximum exposure light quantity be adjusted to embodiment 1 situation under the amount of plain telegram position of photoreceptor A of identical providing-60V ± 5V, and the discharge light quantity be adjusted into comparative example 1 in identical amount, prepared image forming apparatus thus.
Comparative example 3
Photoreceptor A is incorporated in the image forming apparatus 10, wherein with comparative example 2 in identical light scanning unit (the 780nm wavelength 600dpi) is used as light scanning unit 11, and with embodiment 1 in identical discharge lamp unit (with original AR-625S
TMIn identical ruddiness) be used as discharge lamp unit 12.The maximum exposure light quantity be adjusted to comparative example 1 in identical amount, and the discharge light quantity be adjusted into embodiment 1 in identical amount, prepared image forming apparatus thus.
Comparative example 4
Photoreceptor B is incorporated in the image forming apparatus 10, wherein with embodiment 1 in identical light scanning unit (the 405nm wavelength 1200dpi) is used as light scanning unit 11, and with embodiment 1 in identical discharge lamp unit (ruddiness) be used as discharge lamp unit 12.The maximum exposure light quantity be adjusted to embodiment 1 situation under the amount of plain telegram position of photoreceptor B of identical providing-60V ± 5V, and the discharge light quantity be adjusted into embodiment 1 in identical amount, prepared image forming apparatus thus.
Comparative example 5
Photoreceptor B is incorporated in the image forming apparatus 10, wherein with embodiment 1 in identical light scanning unit (the 405nm wavelength 1200dpi) is used as light scanning unit 11, and with comparative example 1 in identical discharge lamp unit (blue light) be used as discharge lamp unit 12.The maximum exposure light quantity be adjusted to comparative example 4 in identical amount, and the discharge light quantity be adjusted into comparative example 1 in identical amount, prepared image forming apparatus thus.
Comparative example 6
Photoreceptor B is incorporated in the image forming apparatus 10; Wherein used with comparative example 2 in identical light scanning unit (780nm wavelength; 600dpi) as light scanning unit 11, and with comparative example 1 in identical discharge lamp unit (blue light) be used as discharge lamp unit 12.The discharge light quantity be adjusted into comparative example 1 in identical amount, hope then with the maximum exposure light quantity be adjusted into embodiment 1 situation under the amount of plain telegram position of photoreceptor B of identical providing-60V ± 5V.Yet, although being set to comparative example 1 to 6 or embodiment 1, light quantity compares enough height, the plain telegram position changes from dark potential hardly, can not provide the value of about-60V.
That is to say that this image forming apparatus just can not produce gratifying image from the incipient stage.
Comparative example 7
Photoreceptor B is incorporated in the image forming apparatus 10; Wherein used with comparative example 2 in identical light scanning unit (780nm wavelength; 600dpi) as light scanning unit 11, and with embodiment 1 in identical discharge lamp unit (ruddiness) be used as discharge lamp unit 12.The discharge light quantity be adjusted into comparative example 1 in identical amount.Hope with the maximum exposure light quantity be adjusted into embodiment 1 situation under the amount of plain telegram position of photoreceptor B of identical providing-60V ± 5V.Yet although light quantity is set to enough height, the plain telegram position changes from dark potential hardly, with identical under the situation of comparative example 6.
That is to say that this image forming apparatus just can not produce gratifying image from the incipient stage.
The assessment of every kind of image forming apparatus
The image forming apparatus of use preparation in embodiment 1 and comparative example 1 to 7 has carried out serviceability test.Following form illustrates the result.
The image forming apparatus that in embodiment and comparative example, prepares is assessed according to standards.
VG: obtained very remarkable image, had enough printing densities; There are not image deflects such as fuzzy, coarse and flaw; And high definition and high resolving power.
G: obtained remarkable image, had enough printing densities; And less than image deflects such as fuzzy, coarse and flaw.
NB: obtained the image of complete acceptable level and gratifying quality, had printing density some reductions are arranged; Only if or examine could find can not the identification level fuzzy and flaw (no problem when browsing).
B: obtained ropy image, had density and reduce,,, when printing, totally browsed and to discern such as the problem of phantom memory such as image deflects fuzzy and flaw.
VB: obtained poor quality and the state image also poorer, had significant image deflects than B.
In embodiment that uses near near the photoreceptor A that has enough sensitivity wavelength 405nm and the wavelength 780nm 1 and comparative example 1 to 3, under any condition, all obtained remarkable result at initial period.
Specifically, in the embodiment 1 and comparative example 1 of the exposure light that uses 405nm, obtained remarkable image, comprised with comparative example 2 and compare the higher resolution image that can accurately duplicate with 3.
In addition, formation repeats to image, with the assessment durability.In using the comparative example 1 and 2 of blue light as discharging light, when number reached 75k, image level descended, and after number reaches 100k, the quick deterioration of picture quality.
In addition, when number reach 200k and accomplish the test after photoreceptor is observed, find that change has taken place its surface quality.
On the other hand; In the embodiment 1 and comparative example 3 that use ruddiness as discharging light, even when number reaches 125k, initial remarkable image level is still kept; Subsequently; When number reaches 200k, reduce although compare image level with initial level, also still keep the acceptable image level.
In addition, after number reaches 200k and accomplishes test, photoreceptor is observed, found the not variation of the quality of photoreceptor own, become to have tiny flaw although worn and torn in its surface.
Comparative example 4 to 7 has used photoreceptor B, and it has enough sensitivity near the 405nm wavelength, but near the 780nm wavelength, does not have enough sensitivitys.
In the comparative example 6 and 7 that uses 780nm exposure light, can not obtain enough to eliminate the sensitivity (dark potential) of electric charge.That is to say that dark potential is almost kept former state, even after exposure, the result, but can not obtain to comprise the printing of recognition image, because image does not have enough density.
In using 405nm exposure light and the comparative example 4 of ruddiness as discharging light; Obtained to have the image of sufficient density; But the memory of the electric charge that before charge step, produces through exposure and transfer printing; Can not eliminate through discharge, the image that begins to produce from initial period just stands the influence of phantom memory, thereby has stoped the generation of normal picture.
In use 405nm exposure light and the comparative example 5 of blue light, high resolving power, accurate and remarkable image have been obtained at initial period as discharging light.But when number reached 75k, image level descended, and after number reaches 100k, the quick deterioration of picture quality.
In addition, when number reach 200k and accomplish the test after photoreceptor is observed, find that its surface quality changes.
Following table has been summed up the result once more.
Table 2
G: brilliance
NB: can accept
B: unsatisfactory
That is to say,, obtained high resolving power and high durable image forming apparatus through using the titanyl phthalocyanine photoreceptor and utilizing light that light with blue wavelength has red wavelength as exposure light and utilization as discharging light.
According to the present invention; Used the titanyl phthalocyanine photoreceptor that in 380nm to 420nm wavelength region may and 600nm to 850nm wavelength region may, has absorption; Light to allow use 380nm to 420nm makes public, and uses the light of 600nm to 850nm to eliminate residual charge.In addition, the light (blue light) with short wavelength of 380nm to 420nm is as exposure light, and is littler with the spot diameter that allows writing light, that is to say, allows to improve resolution.In addition, most, long wavelength's with 600nm to 850nm the light (ruddiness) that has constituted the total amount that is applied to the light on the photoreceptor is as discharging light, to allow to minimize in the photoreceptor because the light deterioration that short wavelength's light causes.As a result, can realize that image forms with high printed resolution, and after over a long time, have lower deterioration in image quality.
Claims (4)
1. image forming apparatus comprises:
Photoreceptor;
Charging device, said charging device are used for said photoreceptor is charged;
Exposure device, said exposure device are used to utilize light to shine the surface of said photoreceptor, to form electrostatic latent image;
Developing apparatus, said developing apparatus are used for the electrostatic latent image that forms is developed;
Transfer device, said transfer device are used for the image that develops is transferred to paper; And
Electric discharge device, said electric discharge device are used to utilize light to shine the surface of said photoreceptor, to eliminate electric charge, wherein
Said photoreceptor be included in have absorption band in the wavelength region may of wavelength region may and 600nm to 850nm of 380nm to 420nm titanyl phthalocyanine as charge generating material; The light that said exposure device utilization has 380nm to 420nm wavelength shines the surface of said photoreceptor to form said electrostatic latent image; And said electric discharge device uses surface that the light with 600nm to 850nm wavelength shines said photoreceptor to eliminate electric charge
Wherein titanyl phthalocyanine is the crystal titanyl phthalocyanine; In the X-ray diffraction wave spectrum of CuK α characteristic X-ray (wavelength:
); Be 7.3 °, 9.4 °, 9.6 ° and 27.2 ° at Bragg angle (2 θ ± 0.2 °) and locate to have main peak; The peak bundle that is wherein overlapped by 9.4 ° and the 9.6 ° peaks located and forms is the peak of maximum, and is second largest peaks at 27.2 ° of peaks of locating.
2. the image forming apparatus described in the claim 1, wherein said exposure device is used for the printing of high printed resolution.
3. the image forming apparatus described in the claim 1, wherein said exposure device is a blue semiconductor laser.
4. the image forming apparatus described in the claim 1, wherein said electric discharge device is a red LED.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009126403A JP4790047B2 (en) | 2009-05-26 | 2009-05-26 | Image forming apparatus |
| JP2009-126403 | 2009-05-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101900957A CN101900957A (en) | 2010-12-01 |
| CN101900957B true CN101900957B (en) | 2012-07-18 |
Family
ID=43220368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101895612A Expired - Fee Related CN101900957B (en) | 2009-05-26 | 2010-05-26 | Image forming apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8340551B2 (en) |
| JP (1) | JP4790047B2 (en) |
| CN (1) | CN101900957B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6071439B2 (en) * | 2011-11-30 | 2017-02-01 | キヤノン株式会社 | Method for producing phthalocyanine crystal and method for producing electrophotographic photoreceptor |
| CN102998918B (en) * | 2012-11-20 | 2015-04-29 | 宁波舜韵光电科技有限公司 | Four-layer coating process of organic photoconductor drum and organic photoconductor drum prepared by adopting same |
| CN102998917B (en) * | 2012-11-20 | 2014-12-10 | 宁波舜韵光电科技有限公司 | Three-layer coating process and photosensitive drum prepared by adopting same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0977086A1 (en) * | 1998-07-31 | 2000-02-02 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
| US6210847B1 (en) * | 1998-10-28 | 2001-04-03 | Sharp Kabushiki Kaisha | Crystalline oxotitanylphthalocyanine and electrophotographic photoreceptor using the same |
| JP2001312081A (en) * | 2000-05-01 | 2001-11-09 | Ricoh Co Ltd | Electrophotographic photoreceptor |
| CN101292198A (en) * | 2005-10-26 | 2008-10-22 | 三菱化学株式会社 | Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, and image forming apparatus |
| US20090061338A1 (en) * | 2007-08-31 | 2009-03-05 | Xerox Corporation | Boron containing photoconductors |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05249708A (en) * | 1992-03-04 | 1993-09-28 | Sharp Corp | Electrophotographic sensitive body |
| JP2000007935A (en) | 1998-06-29 | 2000-01-11 | Sharp Corp | Crystal type oxotitanyl phthalocyanine and electrophotographic sensitive material and preparation thereof |
| JP2000199976A (en) * | 1998-12-29 | 2000-07-18 | Sharp Corp | Electrophotographic photoreceptor, its production and electrophotographic image forming method |
| JP3475122B2 (en) * | 1999-05-19 | 2003-12-08 | シャープ株式会社 | Coating solution for electrophotographic photoreceptor and charge generation layer |
| JP2003149837A (en) * | 2001-11-09 | 2003-05-21 | Sharp Corp | Electrophotographic photoreceptor and electrophotographic apparatus using the same |
| JP2003228182A (en) * | 2002-02-01 | 2003-08-15 | Kyocera Mita Corp | Electrophotographic photoreceptor and image forming apparatus |
| JP2004045997A (en) * | 2002-07-15 | 2004-02-12 | Canon Inc | Method of electrophotography and electrophotographic image forming device |
| JP4533100B2 (en) | 2003-11-26 | 2010-08-25 | キヤノン株式会社 | Electrophotographic equipment |
| JP2006208764A (en) * | 2005-01-28 | 2006-08-10 | Ricoh Co Ltd | Image forming apparatus |
| JP2006259018A (en) | 2005-03-16 | 2006-09-28 | Ricoh Co Ltd | Apparatus and method for image forming |
| JP2007011116A (en) | 2005-07-01 | 2007-01-18 | Konica Minolta Business Technologies Inc | Image forming method and apparatus |
| US20070172752A1 (en) * | 2006-01-24 | 2007-07-26 | Tatsuya Niimi | Image forming apparatus and image forming method |
| JP2007226189A (en) * | 2006-01-24 | 2007-09-06 | Ricoh Co Ltd | Image forming apparatus and image forming method |
-
2009
- 2009-05-26 JP JP2009126403A patent/JP4790047B2/en active Active
-
2010
- 2010-05-19 US US12/783,043 patent/US8340551B2/en active Active
- 2010-05-26 CN CN2010101895612A patent/CN101900957B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0977086A1 (en) * | 1998-07-31 | 2000-02-02 | Canon Kabushiki Kaisha | Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus |
| US6210847B1 (en) * | 1998-10-28 | 2001-04-03 | Sharp Kabushiki Kaisha | Crystalline oxotitanylphthalocyanine and electrophotographic photoreceptor using the same |
| JP2001312081A (en) * | 2000-05-01 | 2001-11-09 | Ricoh Co Ltd | Electrophotographic photoreceptor |
| CN101292198A (en) * | 2005-10-26 | 2008-10-22 | 三菱化学株式会社 | Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, and image forming apparatus |
| US20090061338A1 (en) * | 2007-08-31 | 2009-03-05 | Xerox Corporation | Boron containing photoconductors |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2010276678A (en) | 2010-12-09 |
| US20100303500A1 (en) | 2010-12-02 |
| CN101900957A (en) | 2010-12-01 |
| US8340551B2 (en) | 2012-12-25 |
| JP4790047B2 (en) | 2011-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6333629B2 (en) | Electrophotographic photoreceptor and image forming apparatus having the same | |
| JP4316634B2 (en) | Electrophotographic photosensitive member containing enamine compound, image forming apparatus provided with the same, enamine compound and method for producing the same | |
| JP2009020204A (en) | Electrophotographic photoreceptor and image forming device incorporating it | |
| JP2009122513A (en) | Electrophotographic photoreceptor and image forming apparatus | |
| CN101900957B (en) | Image forming apparatus | |
| US20150017580A1 (en) | Electrophotographic photoreceptor and image forming apparatus including the same | |
| JP5866188B2 (en) | Electrophotographic photoreceptor, image forming apparatus using the same, and method for producing electrophotographic photoreceptor | |
| JP2003107764A (en) | Blue diode laser sensitive photoreceptor | |
| US20150160572A1 (en) | Coating solution for forming charge transport layer, electrophotographic photoreceptor prepared therewith and image forming apparatus comprising the same | |
| JP5719886B2 (en) | Electrophotographic photosensitive member and image forming apparatus using the same | |
| JP4565019B2 (en) | Single layer type electrophotographic photoreceptor and image forming apparatus having the same | |
| CN102033441A (en) | Electrophotographic photoreceptor and image forming apparatus provided with the same | |
| JP2009069184A (en) | Electrophotographic photoreceptor and image forming apparatus equipped with same | |
| JP5150345B2 (en) | Single layer type electrophotographic photosensitive member and image forming apparatus having the same | |
| JP2009098366A (en) | Electrophotographic photoreceptor containing triamine compound, image forming apparatus having the same, triamine compound, and method of manufacturing the same | |
| JP5718413B2 (en) | Electrophotographic photosensitive member and image forming apparatus using the same | |
| JP2012103619A (en) | Electrophotographic photoreceptor and image forming apparatus having the same | |
| JP2009014857A (en) | Electrophotographic photoreceptor containing triamine compound and image forming apparatus with the same | |
| JPH11258835A (en) | Electrophotographic image forming member and its production | |
| US6245473B1 (en) | Electrophotographic apparatus with DC contact charging and photosensitive layer with polycarbonate resin in charge generation layer | |
| JP5297700B2 (en) | Single layer type electrophotographic photoreceptor and image forming apparatus having the same | |
| JP2015230406A (en) | Electrophotographic photoreceptor and image forming apparatus using the same | |
| JP2016053634A (en) | Electrophotographic photoreceptor, manufacturing inspection method of the same and image formation device including electrophotographic photoreceptor | |
| JP2004038160A (en) | Blue diode laser sensitive photoreceptor | |
| JP2013246307A (en) | Electrophotographic photoreceptor, and image forming apparatus using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120718 |